<?php
        $string=($post['content']);
        if(strlen($string) >255) {

        $stringCut = substr($string, 0, 255 );
          $trimmedString = trim($stringCut, " ");
        echo ($trimmedString);
        ?>....<a href="<?=APP_ROOT?>/home/view/<?=htmlspecialchars($post['post_id'])?>">Покажи цялата новина</a>
        <?php
        } else {
        ?>
            <p><?=htmlentities($post['content'])?></p>
        <?php  } ?>